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CVE-2026-31985

Disabled and non-configurable TLS certificate validation in n2os-tui when connecting the Remote Collector to a Guardian or CMC, in Remote Collector before v26.2.0

High8.3EPSS 0.20%
Published
Updated
Reserved
Assigned by
Nozomi

Description

When the upstream Guardian or CMC was configured in the Remote Collector via n2os-tui, the generated configuration disabled TLS certificate verification, and no option was provided to enable it. A malicious actor could perform a man-in-the-middle attack and intercept the communication between the Remote Collector and the Guardian or CMC. This could result in theft of the sync token, impersonation of the server, injection of spoofed data (such as false asset information or vulnerabilities) into the Guardian or CMC, or disruption of the data flow between the Remote Collector and the Guardian or CMC.

Scores

CVSS scores of CVE-2026-31985, by who scored it
Scored byCVSSScoreVector
NozomiCNA (assigner)4.0High8.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:L/SC:L/SI:L/SA:N
NozomiCNA (assigner)3.1High8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L
NVDNVD · Awaiting Analysis4.0High8.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:L/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (exploitation in 30 days)
0.20% · top 90% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.3.

Weakness

Affected products

What to do

Solution: Upgrade to v26.2.0 or later.

Workaround: Manually edit the "n2os.conf.user" file in the Remote Collector and remove the "!" prefix from the upstream Guardian or CMC endpoint entry to enable TLS certificate verification.

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .